The all-new powertrains are the backbone of the new 2011 F-Series Super Duty, which has towing capability of 24,400 pounds and payload capability of 6,520 pounds.

The all-new 6R140 heavy-duty TorqShift six-speed automatic transmission is designed to manage the high low-end torque produced by the new diesel engine. The same basic transmission also is mated to the new gasoline engine.

The new transmission features enhanced Tow Haul mode with integrated engine exhaust braking and SelectShift Automatic capability, which includes Progressive Range Select and a manual mode, allowing customers to select the gear to suit their needs.

For 2011, the engineering team optimized the frame and suspension, particularly the leaf springs and spring rate, as well as adjusting the internal valving in all the shock absorbers to enable greater towing and payload capability with further ride refinement.

The 4x2 F-250 and F-350 Super Duty feature modified steering system geometry to take better advantage of the twin I-beam suspension, which combines the performance of an independent suspension with the durability of a beam axle suspension.